A childhood belief about money

As a kid I didn't know that one dollar equals 100 cents (like in any other currency) So when I was 7 or 8 and I was reading new issue of my favorite "Donald Duck" comic magazine, there was a story od Donald hired by uncle Scrooge to take his place in worrying so he would have more time to count his money. The rate was thirty cents per hour. When after four hours they realized that Scrooge had forgotten what was Donald supposed to worry about and he started panicking that one dollar and twenty cents was wasted for nothing. Forgetting that this 1,20$ was for four hours, I assumed that since dollar and twenty cents was like thirty cents, then one dollar was ten cents! It even seemed logical to me, since ten cents was such a nice round number, and this money amount was so often referred to in movies, so it must have been equivalent of one dollar! It was way later when I read it again and realized about these four hours, and that 0,30$*4=1,20$, and that if one dollar was really ten cents, then thirty cents would just make three dollars, instead of 1,20!